Same here, I got mine and went with my mum in March. Surprisingly painless experience for government agencies.
Took about 10 minutes to fill in the details for both of us on the website and booked an appointment time. Went to the Mongkok one on Saturday morning, and had to queue a couple of times for the different processes, but there was either no wait or just 1 number in front. The person helping us take the photo was actually very friendly and polite even taking time to answer my mum's questions or tell her where to find more information.
Overall this process took about 20 minutes (even with my mum asking questions).
Went back 2 weeks later to pick up the new ones and we were in and out in just 10 minutes.
I think they did really well to stagger the different age groups and to also have people booking appointment times so its very smooth and efficient.